Modular IOL design

Abstract

A modular intraocular lens (IOL) with a ring configured to prevent glare artifacts. The ring includes a flange on the posterior rim, in which an anterior surface on the flange has a first profile and a posterior surface of the flange has a second profile non-parallel with the first profile. Non-parallel surfaces of the flange can be configured to defocus light transmitted at off-axis angles through an optic and the flange.

We claim: 
     
         1 . A modular intraocular lens (IOL) base, comprising:
 an annular ring comprising:
 an anterior rim with an anterior opening; and 
 a posterior rim with a flange, wherein: 
 the anterior rim and the posterior rim form an inwardly facing recess configured to receive an optic; 
 a flange anterior surface defines a first profile; and 
 a flange posterior surface defines a second profile, wherein the flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface, 
 wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic. 
   
     
     
         2 . The modular IOL of  claim 1 , wherein:
 the first profile is associated with a first radius of curvature; and the second profile is associated with a second radius of curvature.   
     
     
         3 . The modular IOL of  claim 1 , wherein:
 the flange defines a posterior rim opening with an inner diameter less than a diameter of the anterior rim opening.   
     
     
         4 . The modular IOL of  claim 3 , wherein:
 the optic is shaped to focus light transmitted parallel to the optical axis at a first focal length; and   the flange is configured to defocus light transmitted through the optic at an incident angle off-axis from the optical axis.   
     
     
         5 . The modular IOL of  claim 4 , wherein:
 the incident angle is greater than 25 degrees off-axis.   
     
     
         6 . The modular IOL of  claim 1 , wherein:
 the flange anterior surface is shaped to support the optic.   
     
     
         7 . An intraocular lens assembly, comprising:
 a ring for positioning an optic in an intracapsular bag, the ring comprising:
 an anterior rim defining an anterior rim opening with an inner diameter sized to allow insertion of the optic into the ring; 
 an inwardly facing recess for retaining the optic in the ring; 
 a posterior rim defining a posterior rim opening; and 
 a flange formed on the posterior rim, comprising a flange inner diameter less than a diameter of the optic, wherein:
 a flange anterior surface defines a first profile; and 
 a flange posterior surface defines a second profile, wherein the flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface, 
 wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic. 
 
   
     
     
         8 . The IOL assembly of  claim 7 , wherein one or more of the flange anterior surface and the flange posterior surface comprises a curvature. 
     
     
         9 . The IOL assembly of  claim 8 , wherein:
 the first profile is associated with a first radius of curvature; and the second profile is associated with a second radius of curvature.   
     
     
         10 . The IOL assembly of  claim 9 , wherein the flange posterior surface comprises a convex curvature. 
     
     
         11 . The IOL assembly of  claim 7 , wherein:
 an outer diameter of the flange is greater than the inner diameter of the anterior rim and less than a diameter of the inwardly facing recess.   
     
     
         12 . A method of manufacturing a ring for an interocular lens (IOL), the method comprising:
 forming an anterior rim with an anterior rim opening, the anterior rim opening having a diameter less than a diameter of an optic;   forming a posterior rim defining a posterior rim opening, the anterior rim and the posterior rim defining an inwardly facing recess configured to receive the optic; and   forming a flange relative to the posterior rim, comprising:
 forming a flange anterior surface with a first profile; and 
 forming a flange posterior surface with a second profile, wherein the flange posterior surface comprises a convex posteriorly-extending protrusion extending from the flange posterior surface, 
 wherein the inwardly facing recess is configured to position the optic above the convex posteriorly-extending protrusion in a direction parallel to an optical axis of the optic. 
   
     
     
         13 . The method of  claim 12 , wherein forming the flange comprises forming one or more of the flange anterior surface and the flange posterior surface with a curvature. 
     
     
         14 . The method of  claim 13 , wherein forming the flange posterior surface comprises forming a convex curvature. 
     
     
         15 . The method of  claim 12 , wherein:
 one or more of a cross-section profile of the flange anterior surface, a cross-section profile of the flange posterior surface and an axial distance between the flange anterior surface and the flange posterior surface are formed to defocus off-axis energy passing through the ring.   
     
     
         16 . The method of  claim 12 , further comprising:
 forming the inwardly facing recess on an interior surface of the ring for retaining the optic in the ring.